New to the laser world - some burning shift


New here! Can anyone help me out why I’m getting an burn shift in some spots? Plus, I’m having to burn so slowly to get clean lines (Speed 200mm/mi at 1% power)
FoxAlien 80W Optical Output 20W - GRBL - Lenovo Laptop running Windows 10

Diagnostic wise try this
a) disable bi-directional engraving with your layer
b) engrave some text
If the issue disapears instanly
You need to tighten your X belts

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